Stapling device



F. KING 2,757,378 STAPLING DEVICE 3 Sheets-Sheet 1 Aug. 7, 1956 Filed Oct. 16, 1953 .0.1L mm WML. 5

Aug. 7, 1956 F. KING 2,757,378

STAPLING DEVICE Filed oct. 16. 195s s sheets-sheet 2 o V ci.. 2.

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INVENTR. FRANK KING' Filed 06f'. 16. 1953 s'rAPLING DEVICE Frank King, Port Monmouth, N. J., assigner to Arrow Fastener Co. inc., Brooklyn, N. Y., a corporation oi' New York Application @ctoher 16, 1h53, Serial No. 386,505

18 Claims. (Cl. 1-49) This invention relates to a stapling device having a novel toggle actuating mechanism.

One object of the present invention is to provide a device of the character described, comprising a staple driver, a striker member movable upon impact with the work to be stapled, and a novel toggle mechanism for actuating said staple driver in response to movement of said striker member.

Another object of the invention is to provide a device of the character described wherein said toggle mechanism comprises a drive lever having one end pivotally connected to the frame of the device, and the other end pivotaily connected to the staple driver for moving the latter in a stapling stroke' upon pivotal movement of the lever, and toggle link mechanism actuated by movement of the striker member to pivot the lever.

A further object of the invention is to provide that said toggle mechanism comprise a toggle lever pivotally connected to the frame and having one end engaging said striker member, and a link pivotally connected to the other end of the lever and to said drive lever, whereby movement of the striker member will cause said toggle lever to pivot thereby actuating the drive lever and the staple driver through said second link.

Another object of the invention is to provide the striker member with a cam engaging surface formed thereon, said toggle lever having a cam portion engaging said cam engaging surface whereby movement of the striker member will cause said toggle lever to pivot in the abovenoted manner.

Still another object of the invention is to provide that the drive lever be engaged with the staple driver so as to be both pivotally and slidably connected thereto, the drive lever having an elongated slot receiving a pin secured to the driver.

Another important object of the invention is to provide that the toggle mechanism be so arranged that the toggle approach its dead center position as the staple is being driven into the work, whereby the force exerted on the staple driver increases during the later stages of its stroke as the force required to drive the staple deeper into the work increases.

A further object of this invention is to provide a novel frame construction comprising a pair of nesting U-shaped cover members located at the forward open end of the main frame, the rst cover member cooperating with longitudinal recesses formed in the forward edges of the main frame side Walls to form vertical slots slidably receiving the staple driver for vertical reciprocal movement.

Another object of this invention is to provide a novel toggle arrangement of the character described, and wherein an excess impact on the striker member will allow the toggle linkage to move past dead center position without causing injury to any part of the mechanism.

Still another object of this invention is to provide a frame construction of the character described wherein the second cover member is spaced forwardly of said first ited States Patent() 27,757,378 Patented Aug. 7, 1956 cover member so as to provide therebetween an enclosed vertical slideway for slidably receiving the striker member for vertical reciprocal movement.

Another object of this invention is to provide a stapling device of the type having an actuating knob adapted to be pressed downwardly by the operator and having the novel toggle mechanism of the character described in the objects above.

Other objects and advantages of the present invention are inherent in the structure disclosed and claimed or will become apparent as the detailed description proceeds.

in the accompanying drawings:

Fig. l is a longitudinal sectional view of a hammer type stapling device in accordance with a preferred embodiment of the present invention, showing the mechanism in an inoperative position;

Fig. 2 is a sectional view of the forward end of the device similar to Fig. l but shows the mechanism in its final position at the end of a staple driving stroke;

Fig. 3 is a horizontal sectional view taken on the line 3 3 of Fig. 2;

Fig. 4 is a vertical sectional view taken on the line lie-4 of Fig. l;

Fig. 5 is a sectional view taken lon the line 5 5 of Fig. l;

Fig. 6 is a horizontal sectional view taken on the line 6--6 of Fig. l;

Fig. 7 is a vertical sectional view taken on the line 7-7 of Fig. 2;

Fig. 8 is a side elevational view of the forward end of the device with parts broken away for greater clarity;

Fig. 9 is a front elevational view as seen from the left of Fig. 8;

Fig. l0 is a longitudinal cross-sectional view of another form of the invention wherein the toggle mechanism is actuated by a hand-operable member;

Fig. 1l is a vertical sectional view taken on line 1li-11 of Fig. 12;

Fig. l2 is a side elevational view of the device of Fig.

10; and

Fig. 13 is a front View of the device of Fig. 10.

Referring now to the drawing in more detail, the reference numeral 11 indicates generally a main frame or housing for the device and comprises a pair of spaced paraliel vertical side walls 12, 13 joined by an upper wall fifa having a rear horizontal portion 15 so as to provide a hollow rearwardly extending elongated handle 16 by which the device may bergripped and wielded like a hammer. The forward portion I17 of upper wall 14 slopes forwardly and upwardly to its front edge at 18. The side walls 12, 13 are provided at their forward ends with extensions i9, 2th respectively, projecting above and forwardly of the front edges 18 of upper wall 14. y The rear, bottom and forward end of frame 11 are open.

A top cover member 21 is provided with a horizontal portion 22 engaging the upper edges of side wall exten# sions i9, 20 and with a vertical portion 23 engaging the rear edges of said extensions 19, 20. A first front cover member 24 (Fig. 6) of approximately U-shaped crossseetion is provided with a central vertical web portionl spaced forwardly of webportion 25 of the trst covery member 24, thereby providing an enclosed vertical slideway 32 as best seen in Fig. 6. The wall portions 33, 34 of cover member 30 extend rearwardly of web portion 31 and lie in superimposed abutting relation on the exterior surface of Wall portions 28, 29 of the `first cover member 24. The forward edges 26, 27 of side wall extensions 19, are each provided with a vertical longitudinal recess at 35 (Fig. 8) cooperating with the adjacent surface of web portion to form therebetween a pair of spaced parallel vertical slots 36.

Top cover member 21 ('Fig. 8) has formed integral with the horizontal portion 22 thereof a pair of integral downwardly projecting ears 37, 38 abutting against the exterior surfaces of wall portions 33, 34 of said second front cover member 30. As shown in Fig. 8, said wall portions 33, 34 and also wall portions 2S, 2.9 of cover member 24 are provided with inclined edges at 39 leading to Vertical edges at 40, horizontal edges at 41, short vertical edges at 42, rearwardly inclined edges at 43, rounded edges at 44, and vertical edges at 45. it will be seen that vertical edges 40, 42 and horizontal edges 41 combine to form shallow rectangular recesses 46 mutually aligned in said wall portions 28, 29, 33, 34.

As shown in Figs. 6 and 8, a at horizontal spacer element 47 is provided wi-th oppositely-extending shoulder portions 48, 49 lying within said recesses 46. The side edges 50, 51 of spacer element 47 abut against the interior surfaces of side wall extensions 19, 2@ to maintain the latter rigidly in fixed spaced relationship.

A longitudinal U-shaped staple magazine 52 extends substantially throughout the lower interior of frame 11 and comprises a pair of vertical walls 53, 54 integral at their lower edges with a horizontal bottom portion 55. Each of the upper edges of walls 53, 54 is provided with an inturned horizontal ange 56, 57', respectively. The exterior surfaces of walls 53, 54 abut against the interior surfaces of side walls 12, 13 of frame 11, as best seen in Fig. 4, and the bottom portion 55 lies ush with the lower edges of side w-alls 12, 13, At the forward end of magazine 52 the flanges 56, 57 abut against the lower surface of spacer element 47.

A Ushaped staple guide channel 58 extends throughout the interior of magazine 52 and is provided with a horizontal bottom portion 59 resting upon the upper surface of bottom portion '55 of magazine 52. Extending upwardly from bottom portion 59 are a pair of spaced para-llel vertical portions 60, 61 parallel to and spaced inwardly of the respective adjacent side walls 53, 54 of magazine 52, the upper edges of vertical portions 643, 61 being spaced below the flanges 56, 57 of magazine 52. There is thus provided between `walls 53, 54, vertical portions 60, 61 and flanges 56, 57 an inverted U-shaped space of the same coniiguration as the staples S which may be placed in series within said space throughout the length thereof.

An inverted U-shaped staple pusher 62 is slidably mounted within said space and abuts against the rear end of the series of staples S, as shown in Figs. l and 7.

A portion of the top wall 63 of pusher 62 is struck downwardly at 64 to project between anges 56, 57 and into the interior of staple guide channel v58. Said portion 64 is provided with an opening slidably receiving a longitudinal rod 65 having an enlarged head 66 at its forward end and extending rearwardly within guide `channel S8. The rear end of rod 65 is bent upwardly at 67, forwardly at 68, and downwardly at 69 to fit within an elongated opening 70 formed in the offset portion 7'1 of a bracket 72 secured to the rear end of frame upper wall 14 by a rivet 73. A long coil spring 74 surrounds rod 65 and has a forward end abutting portion 64 and a rearward end secured to rod 65 at 75, thereby urging staple pusher 62 forwardly to advance the staples S forwardly within magazine 52. To reload magazine 52 with additional staples, portion 69 of rod 65 is raised out of opening 70 to allow rod 65 to be drawn rearwardly so as to enable head 66l tol engage portion 64 of pusher 62 and thereby pull the latter out of the magazine.

A striker member 76k of rectangular cross-section is vertically slidable within slideway 32 formed by front cover members 24, 30. The lower end of striker member 76 is provided with an enlarged rounded head 77 for contacting the work to be stapled. The upper portion of striker member 76 has an opening 78 extending therethrough, the lower edge 79 of opening 78 being formed with a cam surface. The vertical web portion 31 of front cover member 30 is recessed at its upper portion at Si).

As shown in Fig. 4, a pivot pin 81 is provided with its opposite ends extending through suitable openings in the various wall portions of the frame and extends through the hollow interior of a bearing bushing 82. A toggle lever 83 is rotatably mounted intermediate its opposite ends on bearing bushing 82 and is provided with an angularly extending cam portion 84 having an `arcuate cam surface 85 engaging cam engaging surface 79 of opening 7S in striker member 76. The forward end of cam portion S4 extends through the clearance space provided by the recess 80 in vertical web portion 31.

As best seen in Figs. l, 2 and 5, the opposite end of toggle lever 83 is pivotally connected by a pivot pin 86 to the upper ends of a pair of parallel toggle links 87, 88, the lower ends of which are pivotally connected by a pivot pin S9 to a drive lever 90 adjacent the forward end of the latter. The rear end of drive lever 90, as shown in Fig. 7, is pivotally mounted to frame 11 by a pivot pin 91 having opposite ends mounted within suitable openings formed in side walls 12, 13. A pair of spacer washers 91 are mounted on the ends of pivot pin 91 to restrain the rear end of drive lever against sliding movement thereon.

The forward end of drive lever 90 is provided with a longitudinal recess 92 slidably and pivotally receiving a pin 93 secured at its opposite ends to the spaced legs 94 of a U-shaped bracket 95 having a base portion 96. The latter is secured by a rivet 97 to a relatively thin vertical staple driver 98, as seen in Fig. 3. A slot 97 in web portion 25 provides clearance for the head of rivet 97. Staple driver 98 has opposite ends extending within vertical slots 36 formed by recesses 35 in the forward edges 26, 27 of side wall extensions 19, 2G, whereby driver 98 is slidably mounted for vertical reciprocal movement.

As shown in Fig. 5, a spacer sleeve 99 and rivet pin 11i-9 therethrough extend transversely across the rear upper portion of the interior space bounded by side wall extensions 19, 2) to maintain the latter in proper spaced relation and thereby provide clearance for the free movement of toggle mechanisms 83, 87, 8S. A rivet 101 extends across the interior space of the frame to help maintain the several elements of the latter in assembled relationship and the lower edge of drive lever 90 is recessed at 102 to clear rivet 101.

A torsion spring 103 is coiled about bushing 82 and has one end 104- abutting against vertical web portion Z5 of cover member 24 and the other end 105 hooked around the lower edge of toggle lever S3 adjacent the end of the latter which is pivotally connected to toggle links S7, 88.

The operation of the device will now be briefly described. The handle portion 17 is grasped by the operator and the device is swung down upon the work to be stapled in the manner of a hammer to cause head portion 77 of striker member 76 t-o receive an impact blow upon contacting the work. The striker member 76 is thus moved upwardly from the initial position shown in Fig. l toward its final position shown in Fig. 2. Cam surface 79 of striker member 76 engages cam surface 85 to pivot toggle lever 83 in, a clockwise direction as viewed in Figs. l and 2, thereby actuating toggle links 87, 88 to pivot drive lever 9i) downwardly about rear pivot pin 91 from its initial inclined position of Fig. l toward its final horizontal position assumed in Fig. 2.

Recess 92 in the forward end of drive lever 90 thereby engages pin 93 to move staple driver 98 downwardly in a staple driving stroke to drive the foremost staple S, into the work as shown in Fig. 2.

Upon expenditure of the impact energy in this staple driving stroke, torsion spring 103 then urges toggle link in a counterclockwise direction thereby returning striker member 76 to its lowermost initial position and pulling on toggle links 87, 88 to raise drive lever 90 to its initial inclined position and thereby to raise staple driver 98, the mechanism then being in the initial inoperative state shown in Fig. 1 and the above-described cycle of operation may be repeated.

it will be noted that if too great an impact is imparted to striker member 76, that is, an impact greater than required to drive a staple into the work, toggle mechanism 83, 87, 88 will pivot past the dead-center position in which pivot pin 86 is aligned with pivot pins S1 and 89, thereby absorbing the excess impact energy to prevent excess stress and rupture of any of the parts of the mechanism.

Another advantage of the toggle arrangement is that its mechanical advantage increases toward the dead-center position thereby providing an increase in driving force as the staple goes deeper into the work and offers increased resistance to continued movement.

Referring now to Figs. l() to 13 wherein is illustrated a modified forni of stapling device having a hand-operable member for actuating the toggle mechanism, the reference numeral 121 indicates generally a frame housing comprising side walls 122 having upwardly projecting extensions 123 at their forward ends, bottom wall 124, top wall 125, and front wall 126. The staple magazine components are identical to those previously described with reference to the preferred form of the device shown in Figs. l to 9 and are indicated by the same reference numerals, further description thereof being unnecessary.

Th toggle mechanism of the second form is also identical to that of the above-described modication as to drive lever 98 pivoted to frame side walls 121 by pivot pin 91 and having a recess 92 slidably receiving pin 93 secured to U-shaped bracket 9S which is in turn secured to staple driver 98 by a rivet 97. Toggle links 88 are connected at their lower ends to drive lever 90 by pivot pin 89 and at their upper ends by pivot pin 86 to a toggle link 183 which is constructed somewhat differently from corresponding toggle link 83 described above.

Toggle lever 183 is rotatably mounted on pivot pin 81 extending etween side wall extensions 123 and is provided with an arm portion 184 extending upwardly and rearwardly of pivot pin 81 so as to project from the open upper forward end of frame 120. The extreme end of arm portion 184 is provided with a rounded cam surface 185 engaging the top wall 186 of a hand-operable member 187 having side walls 188, a front wall 189, and a rear wall 190. Said walls 188, 189, 190 of member 187 slidably engage the exterior surfaces of the respective adjacent walls of frame 120. Pin 100 has opposite ends extending within vertical slots 191 formed in side walls 188 so as to guide member 187 for vertical reciprocal sliding movement.

It will be obvious that when member 187 is urged downwardly by the hand of the operator, toggle lever 183 will be thereby pivoted in a clockwise direction as viewed in Fig. l0 to actuate the mechanism and to move staple driver 98 downwardly in the manner explained in more detail with respect to the preferred form of the invention described above. Spring 103 will then return the toggle mechanism and hand-operable member 187 to the original position shown in Fig. l() and the cycle may be repeated.

lt is to be understood that the specilic embodiment shown in Jthe drawing and described above is merely illustrative of one of the many forms which the invention may take in practice without departing from the scope thereof delineated in the appended claims.

Having thus described my invention in some detail, what I claim as new and desire to protect by Letters Patent of the United States, is:

l. A hammer type stapling device comprising a frame, a striker member mounted on the frame and having a head portion projecting downwardly from the frame and being movable upwardly by impact of said projecting portion with the work, a staple magazine for containing and successively feeding a supply of staples, a driver reciprocally vertically slidable in said frame for driving said staples, a drive leverl pivotally connected to the frame and drivingly connected to said driver, and toggle means connected to said drive lever and coacting with said striker member to pivot the drive lever downwardly and thereby to urge the driver downwardly in a staple driving stroke in response to upward movement of the striker member by impact with the work, said toggle means including a toggle lever pivoted to said frame and engaging said striker member, and a toggle link pivoted to said toggle lever and drive lever.

2. A hammer type stapling device comprising a frame, a striker member mounted on the frame to permit reciprocal vertical sliding movement within the frame and having a portion projecting downwardly from the frame and being movable upwardly upon impact of said projecting portion with the work, a staple magazine for containing and successively feeding a supply of staples, a driver reciprocally vertically slidable in said frame for driving said staples, a drive lever pivotally connected to the frame and drivingly connected to said driver, and toggle means connected to said drive lever between its pivoted connection to the frame and its connection to the driver and coacting with said striker member 'to pivot the drive lever downwardly and thereby to urge the driver downwardly in a staple driving stroke in response to upward movement of the vstriker member.

3. A hammer type stapling device comprising a frame, a striker member mounted for sliding movement on the frame and having a portion projecting downwardly from the frame to` impact the work being .stapled to move the striker member upwardly, a staple magazine for containing and -successively feeding a supply of staples, a driver reciprocally vertically slidable in said frame for driving said staples, a drive lever having one end pivotally connected to the frame and the other end pivotally connected to the driver, and toggle means connected to said drive lever and coacting with said striker member to pivot the lever downwardly and thereby to urge the driver downwardly in a staple driving stroke in respon-se to upward movement of the striker member.

4. A hammer type stapling device comprising a frame, a striker member reciprocally vertically slidable within the frame and having a portion projecting downwardly from the frame to impact the work being stapled for moving the striker member, a staple magazine for containing and successively feeding a supply of staples, a driver reciprocally vertically slidable in said frame for driving said staples, a drive lever having one end pivotally connected to the frame and the other end pivotally connected to the driver, and toggle means connected to said lever and coacting with said striker member to pivot the drive lever downwardly and thereby to urge the driver downwardly in a staple driving stroke in response to movement of the striker member.

5. A hammer type stapling device as recited in claim 4 wherein said toggle means comprises a toggle lever pivotally connected to the frame and coacting with said striker member, a toggle link pivotally connected to said toggle lever, and means connecting said toggle link to said drive lever.

6. A hammer type stapling device comprising a frame, a striker member mounted for movement on the frame and having a portion projecting downwardly from the frame to contact the work being stapled for moving the striker member upwardly, a staple magazine for containing and successively feeding a supply of staples, a driver reciprocally vertically -slidable in said frame for driving said staples, and a drive lever pivotally connected to the frame and drivingly connected to said driver, a toggle lever pivotally connected to said frame and coacting with said striker member, and a toggle link having one end pivotally connected to saidtoggle 'lever and the other pivotally connected to said drive lever.

7. A hammer type stapling device comprising a frame, a striker member reciprocally vertically and Islidably mounted within the frame and having a portion projecting downwardly from the frame to impact ythe work being stapled for moving the striker member upwardly in the frame, a staple vmagazine for containing and successively feeding a supply of staples, a driver reciprocally vertically slidable in said frame for driving said staples, a drive lever having one end pivotally rconnected to the frame and the other end pivotally connected sto the driver, a toggle lever pivotally connected to said frame and coacting with Isaid striker member, and a toggle link having one end pivotally connected to said toggle lever andthe other end pivotally connected to said drive lever.

8. A hammer type stapling device comprising a frame, a striker member movably mounted on the frame and having a portion projecting downwardly from the frame to contact the work -being stapled for moving the striker member upwardly, and a cam engaging surface formed on the striker member, a staple ma-gazine for containing and successively feeding a supply of staples, a driver reciprocally vertically slidable in said frame 4for driving said end staples, a toggle lever pivotally connected to the frame f and having a cam portion engaging said cam engaging surface of the striker member, a link pivotally'connected at one end to said toggle lever, and means drivingly connecting the other end of -said link to said driver.

9. A hammer type stapling device comprising a frame, a striker member reciprocally vertically slidable within the frame and having a portion vprojecting downwardly from the frame to impact the work being stapled for moving the striker member upwardly, and a cam engaging surface formed on the `stri-ker member, a drive lever pivotally connected to the frame and drivingly connected to `said driver, a toggle lever pivotally connected to the frame and having a cam portion engaging said cam engaging surface of the striker member, and a toggle link pivotally connected at one end to said toggle lever and pivotally connected at its other end to said drive lever.

l0. A hammer type stapling device comprising a frame, a striker member reciprocally vertically slidable within the frame and having a portion projecting downwardly from the frame to impact the work being stapled for moving the striker member upwardly, a staple magazine -for containing and successively feeding a supply of staples, a driver reciprocally vertically slidable in said frame for driving said staples, a drive lever having one end pivotally connected to the frame, means connecting the other end of the lever to said driver for relative pivotal and slidable movement of said other end with respect to the driver, and toggle means connected to said drive lever between the pivoted end of the drive lever and the end thereof connected to the driver and coacting with said striker member to pivot the drive lever downwardly and thereby to urge the driver downwardly in a staple driving stroke in response to upward movement of the striker member.

l1. A hammer type stapling device as recited in claim l() wherein said connecting means comprises a pin secured to the driver, said lever other end having an elongated slot slidably and pivotally receiving said pin.

l2. A hammer type stapling device comprising a frame, a striker member reciprocally vertically `slidable within the frame and having a portion projecting downwardly from the frame to contact the work being stapled for moving the striker member upwardly, and a cam engaging surface formed on the striker member, a staple magazine for containing and successively feeding a supply of staples, a drivel'` reciprocally vertically slidable in said frame for driving said staples, a drive lever having one end pivotally connected to the frame, means connecting the other end of the drive lever to said driver for relative pivotal and slidable movement of said other end with respect to the driver, a toggle lever pivotally 'connected to the frame and having a cam portion engaging said cam engaging surface of the striker member, and a toggle link pivotally connected at one end to -said toggle lever and pivotally connected at its other end to said drive lever.

13. A hammer type stapling device as recited in claim l2 wherein said connecting means comprises a pin secured to the driver, said ldrive lever other end having an elongated slot slidably and pivotally receiving said pin.

14. A hammer type stapling device comprising a main frame having a pair of spaced parallel walls, a first U- Shaped cover member having a pair of spaced parallel vertical wall portions joined by a vertical web portion extending therebetween, each of said wall portions extending in superimposed abutting relation to a respective one of said main frame walls, and said web portion extending perpendicular to and abutting against the forward edges of said main frame walls, said forward edges each having a vertical recess formed therein coacting with said web portion to form therebetween a pair of vertical slots, a second U-shaped cover member having a pair of spaced parallel vertical wall portions joined by a vertical web portion therebetween, each of said last recited wall portions extending in superimposed abutting relation to a respective one of said first cover member wall portions, said last recited vertical web portion extending parallel to and spaced forwardly of said first cover member web portion so as to form an enclosed vertical slideway therebteween, a striker member slidably mounted within said vertical slideway and having a portion projecting downwardly therefrom to impact the work being stabled for moving the striker member upwardly, a staple magazine for containing and successively feeding a supply of staples, a staple driver located between said walls and having oppositely extending portions projecting horizontally into said vertical slots and verticaly slidable therein so as to mount the driver for vertical reciprocal movement, and toggle means coacting with said driver and said striker member and responsive to movement of the striker to urge the driver downwardly in a staple driving stroke.

l5. A hammer type stapling device comprising a main frame having a pair of spaced parallel walls, a rst U- shaped cover member having a pair of spaced parallel Vertical wall portions joined by a vertical web portion extending therebetween, each of said wall portions extending in superimposed abutting relation to a respective one of said main frame walls, and said web portion extending perpendicular to and abutting against the forward edges of said main frame walls, said forward edges each having a vertical recess formed therein coacting with said web portion to form therebetween a pair of vertical slots, a second U-shaped cover member having a pair of spaced parallel vertical wall portions joined by a vertical web portion therebetween, each of said last recited wall portions extending in superimposed abutting relation to a respective one of said iirst cover member wall portions, said last recited vertical web portion extending parallel to and spaced forwardly of said lirst cover member web portion so as to form an enclosed vertical slideway therebetween, a striker member slidably mounted within said vertical slideway and having a portion projecting downwardly therefrom to impact the work being stapled for moving the striker member upwardly, a staple magazine for containing and successively feeding a supply of staples, said striker member having a cam engaging surface formed thereon, a toggle lever pivotally connected to the frame and having a cam portion engaging said cam engaging surface of 'the striker member, a drive lever having one end pivotally connected to the frame, means connecting the other end of the drive lever to said driver for relative pivotal and slidable movement of said other end with respect to the driver, and a toggle link pivotally connected at one end to said toggle lever and pivotally connected at its other end to said drive lever.

16. A stapling device comprising a frame, a member on the frame movable thereon, a staple magazine for containing and successively feeding a supply of staples, a driver reciprocally vertically slidable in said frame for driving said staples, a drive lever having one end pivotally connected to the frame, means connecting the other end of the drive lever to said driver by a pin and slot connection, a toggle lever pivotally connected to the frame and having a cam portion engaging said member, and a toggle link pivotally connected at one end to said toggle lever and pivotally connected at its other end to said drive lever.

17. A stapling device comprising a frame, a member reciprocally and vertically slidable on the frame in response to movement thereof, a staple magazine for containing and successively feeding a supply of staples, a driver reciprocally vertically slidable in said frame for driving said staples, a drive lever having one end pivotally connected to the frame and the other end pivotally connected to the driver, and toggle means pivoted to said frame, connected to said lever and engaging with said member, to pivot the lever downwardly and thereby to urge the driver downwardly in a staple driving stroke in response to movement of the member in one vertical direction.

18. A stapling device comprising a frame, a member mounted on the frame and movable thereon, a staple magazine for containing and successively feeding a supply of staples, a driver reciprocally vertically slidable in said frame for driving said staples, a drive lever having one end pivotally connected to the frame and the other end pivotally connected to the driver, a toggle lever pivotally connected to said frame and engaging with said member, a toggle link having one end pivotally connected to said toggle lever and the other end pivotally connected to said drive lever, and means for moving the toggle lever upon moving said member.

References Cited in the tile of this patent UNITED STATES PATENTS 1,688,037 Crofoot Oct. 16, 1928 2,001,092 Cavanagh May 14, 1935 2,441,120 Libert May 4, 1948 2,463,507 Barclay Mar. 8, 1949 2,463,579 Vail Mar. 8, 1949 2,466,856 Makin Apr. 12, 1949 2,645,773 Dugin July 21, 1953 

